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Posted
On 6/6/2026 at 1:43 PM, JohnCh said:

You need to start a thread on how the 420R, 620S, and CSR 260 compare on track. #peerpressure

 

Its not exactly a 620 despite the label.  Actually a 700S.....   #faaaaaarkitsquick  #gripchallenged

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Posted

The Duratec pump is on the crannkshaft llike a Zetec?  I did not know that.

 

I don't remember an engine with a belt-driven oil pump, just water pumps.

 

The oil pump on my Caterham 1700 was driven by a shaft, presumably  driven off the camshaft.  I'm told tht the Lotus-Ford Twin Cam still has the camshaft in the block, only there to run the oil pump (and distributor?)

Posted (edited)

Taken Sunday at the autocross.

 

IMG_1468FrontQuarterBirkinFS.thumb.JPG.344b283cc788f78a8b8bd05e0bcde4c9.JPGIMG_1469RearQuarterBirkinFS.thumb.JPG.2a6886af5754b805a99e6da28abe344e.JPG

 

When I drove in on Saturday, some wags in the club asked me if the car was for sale.  Really original humor.

 

I said yes, but I didn't tell them why.  I only said that I had not driven to California for the scenery.

 

This was a good Seven to bring to a novice school:  It has ordinary 3-point belts so students did not have to mess about with more-exotic restraints.  I generally don't beat all the students at these things, but this time I did.  I was trying harder because of the cycled-out tires. 

 

Practice event Saturday, so I plan to spring the orange beast on them.  The tires are not legal for XU, but fortunately, the practice day is a classless event.

 

I wound up second of three in XU on Sunday.  I want to sell this car so it needs to look more-impressive next Sunday.  When I got home ordered 4 fresh Yoko 052 tires from Tire Rack.  They are in-stock at their Roseville warehouse.  I pick them up Tuesday.

 

 

IMG_1471 Left side Birkin FS.jpg

Edited by pethier
multiple errors ...
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Posted
6 hours ago, pethier said:

The oil pump on my Caterham 1700 was driven by a shaft, presumably  driven off the camshaft.  I'm told tht the Lotus-Ford Twin Cam still has the camshaft in the block, only there to run the oil pump (and distributor?)

 

And the mechanical fuel pump, should it be so equipped.

Posted
8 hours ago, pethier said:

The Duratec pump is on the crannkshaft llike a Zetec?  I did not know that.

 

It's not. The pump is chain driven off the crank

Posted (edited)
1 hour ago, JohnCh said:

 

It's not. The pump is chain driven off the crank

Ah.  So the oil pump is immune to the clutch-limit disaster.  It would be the thrust washer itself that would take the hit.

 

I wonder how unusual the Zetec is for its oil-pump placement.

Edited by pethier
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